n BORAGINE^ — SOLAN ACEyE 299 



Cynoglosstjm 



Flowers in one-sided cymes. Corolla -tube short, 

 with scales at the mouth closing the aperture, and 

 forming a roof to the chamber containing the honey, 

 stamens, and pistil. The dispersal of the nuts is 

 ensured by the presence of numerous short hooked 

 prickles. There are two British species : C. officiyiale, 

 with soft appressed hairs, and C. montanum, with rough 

 scattered hairs. 



0. officinale. — Corolla dullish purple. The stamens 

 are longer than the pistil. The leaves are soft, with 

 fine appressed down. 



C. montanum. — The leaves are thin, semi-transparent, 

 glabrous above, rough below, with scattered hairs on 

 tubercles. The stem bears soft spreading hairs. 



SOLANACE^ 



Datura 



Homogamous moth-flowers. Nectar secreted by the 

 base of the ovary. Not indigenous, but sometimes 

 found wild in Britain. 



D. Stramonium (Thorn-apple). ■ — The pure white 

 flower has a strong smell of musk, which is specially 

 strong at night ; it opens about seven in the evening, 

 and, according to-Kerner, only lasts one day. In bad 

 weather the corolla folds up and closes. The tube has 

 a length of about 60 mm. The stamens are attached to 

 the corolla by their centres, but the sides widen out, so 

 that they touch one another, and leave five narrow tubes 

 leading down to the honey. The stigma is about at the 

 same height as the anthers. It is a North American 

 plant, which has become widely introduced in the Old 

 World. 



